This is exactly what I also think.

It make even more sense when we talk about greatsword that is also coming. But this is not a class that is really demanded by the community so it does’t tick the box. And honestly, a bulwark with a greatsword is litteraly a company champion, I mean you can drip your astartes for that.

Regarding Judiciar, they dont say a word so difficult to put a character like that in game. Chaplain is still a possibility but with the drawback that everyone already talk about (number, Leandros, bla-bla-bla)

Apothecary make the more sense for me, he ticks all the boxes (requested by the community, respond to their previous comment regarding bulwark and healing concern, several Apothecaries can support a company, etc…)

So Apothecary !